Electric heater



Nov, 2 1926. 1,604,979. M. D. DOMLNGUEZ ELECTRIC HEATER Original Filed Nov. 22. 1925 .9. Sheets-Sheet l I enfin, y MHA/ML @MM/@mez i 011m 'Y0/71' v atlforneqs Nov. 2 1'926 1,604,979

'M. D. DOMINGUEZ ELECTR I C HEATER Original Filed Nov. 22. 1923 2 sneens-snee. 2

.Patented Nov. 2, 1926.

MANUEL D. DOMINGUEZ, OF NEW ORLEANS, LOUISIANA., ASSIGNOR '120 CHARLES A.

DENIS AND GEORGE SARPY, BOTH .0F NEW'ORLEANS, LOUISIANA.

ELECTRIC HEATER.

^ Application med Novemberaaieas, serial Name/.1.14. Renewed April e, 192e.

The invention relates to electric heaters,

a and has as anvobject the provision of asim- `ple-and compact device of the character described which will lact automatically to apply heat to thewater is opened to draw water.' A further object of the invention is the provision of a heater having the heated 'portion of the water pipe insulated in such a manner as lo to make' the electric element readily accessible without disturbing the water connections. A further objectol:l the invention is the provision of a water'l heater that .requires no support other than the water pipe. 15 A 'further object is the provision of a heater having means for removal of water of condensation. Other bbjects will appear from the following description when read in conl nection with the accompanyingl drawing, wherein, l

Figure 1 is a sideelevation showmg a portion of the heat insulating jacket removed and a portion thereof in section.

Figure 2 is a plan "view partly broken away. l Y

Figure 3 is an elevatlon seen from the left of Fig. 1.

The entiredevice as shown is adapted to receive its support from the water pipe 10. Water is drawn from the pipe `l by means of pipe 11 and after passing through the heating coil 12 returns-to the pipe 10 by means of the pipe 13 for use. When the heater is tobe utilized lthe valve 14 is closed and the ,valve 15 is opened. If it be desired 'to draw water from'the tap 'supplied by the pipe 10 without the use ofthe heater the valve 15 lmay be closed andthe valve 14 opened, in which case `the heater could be removed if desired. e p

The heating coils 12-are preferably made `of a material which isa ready conductor of heat, such as copper, and may be secured to pipes 10 and 13 as by means of unions 16, 17. To heat insulate the coil.12 there is shown an asbestos jacket 18 of substantial" thickness; which is preferably formed as two halvesy of a cylinder, which halves may be' secured together by meansof wires 19 seated in channels 20 in the surface of the asbestos. To protectthe exterior ofthe insulation a casing 21 is shown preferably formed of aluminum castings of semlcylindrical formp ovided with flanges 22, screwed or vbolte together by fastenings when the water tap` -the valve casing 41 of the switch operating and the passing through openings 23. Thev ends of the coil are shown as protected by plugs l24,

25W ich are retained by covers 26, 27, secure to the casing 2l by screws.

In the event that cold water is allowed to ow through the coils while the. current is cut ofi from the device,'as for instance when the power house is shut down; water may be condensed on the exterior of the coils. from the atmosphere. To catch the drain of such water of condensation the plug 25 is shown as formed with a recess lined by means of a metallic bowl 28, provided with an opening at its center, having a tube 29 leading therefrom to lthe exterior of the device, throughan opening in the plug 25, and also through an openin in the cover27.

An electric heating e ement/is shown dia grammatically at 30, and is preferably ofthe form shown in my co-pending application Serial Number 676,415, filed November 22, 1923. l The terminals 31 of the element are shown as passed through a suitable opening in the plug 24 and secured to and insulated from the cover 26 by suitable lock nuts and insulating washers., A terminal housing 32 is carried by the cover 26 and may have its Yside walls cast integral therewith, acover plate 33 being removably secured at its up. per portion by means of screws 34. When so formed, openings in one ofthe side walls ofthe lcasing 32 are providedfor passage of the .electric conductors 35 36, the openings being provided with suitable insulating bushings 37. The conductors are shown as secured to the terminals 31 within the casing and as passing to the switch housing 38 convtaining a' pressure-operated switch of the f' nature disclosedin myco-pending applica# tion above referred to. v 4

4The pressure-operated switch is shown as supported upon rods 39, 40 mounted upon valve. v l The device will be seen to be exceedingly compact Vand neat in appearance, and requires no further su portV than that ofthe water pipe itself. 1e heating. element/bef ling housed within the cils of the water pipe. The resistanceelements of the heater are brou ht in close'proximityto the coils( Y leating 'element and' coils areboth enclosed in the insulation, so as to provide the most eilicient application of the electric current possible for heating of the Water. When the Water is iiowing through the pipe its rotary motion ensures that all portions of the stream will becomel heated, so that a uniformly heatedstream of Water may be drawn from the hot Water faucet.

Minor changes maybe made in the physical embodiment of the invention .Without departing from its spirit. f

I claim:

1. An electric heater comprising a helically coiled pipe, a cylindrical insulating jacket surrounding alsaid coils, insulating plugs closing the ends of said jacket, a heating element mounted on onel of said plugs and enclosed by said coils, a metallic casing enclosing said jacket and a metallic plate covering each ofv said plugs and secured to said casing.

2. An electric heater 'comprising water pipe connections, a coil carried by said connections, a heating element enclosed by said coil, a cylindrical insulating jacket suri rounding said coil and supportedl by said connections, a metallic casing enclosing said jacket and having circular openings in its ends, insulating plugs insertable. through said openings and closing the ends of said,

jacket, a concave metallic plate h ving a central* opening 1n contact with th 1nner surface of lone 'of said plugs, said plug havplate covering saiglflast named plug and atL tached Ysaid dcasing, and ahousing for electrical termmals carried by said last named plate. v

MANUEL D. DOMINGUEZ.

'most plate-secured to said 1netallic casing, .y

a plug ofinsulating material closing the remalnlng end of said/jacket,agnetallic 

